|Bode plot of frequency response, or magnitude and phase data
|Magnitude-only Bode plot of frequency response
|Plot input and output channels of estimation data (Since R2023a)
|Analysis and recommendations for data or estimated linear models
|Estimate time delay (dead time) from data
|Determine whether model parameters or data values are real
iddata is based on
|Identify possible feedback data (Since R2023a)
|Level of excitation of input signals
|Nonparametric impulse response estimation
|Estimate empirical transfer functions and periodograms
|Estimate frequency response with fixed frequency resolution using spectral analysis
|Estimate frequency response and spectrum using spectral analysis with frequency-dependent resolution
|Option set for
idplot when plotting input/output estimation data
contained in a timetable, numeric matrices, or an
object (Since R2023a)
Examples and How To
- How to Plot Data in the App
After importing data into the System Identification app, as described in Represent Data, you can plot the data.
- How to Plot Data at the Command Line
The following table summarizes the commands available for plotting time-domain, frequency-domain, and frequency-response data.
- How to Analyze Data Using the advice Command
You can use the
advicecommand to analyze time- or frequency- domain data before estimating a model.
- Identify Delay Using Transient-Response Plots
You can use transient-response plots to estimate the input delay, or dead time, of linear systems.
- Is Your Data Ready for Modeling?
Before you start estimating models from data, you should check your data for the presence of any undesirable characteristics.